JPS54116583A - Controller with back-up mechanism - Google Patents
Controller with back-up mechanismInfo
- Publication number
- JPS54116583A JPS54116583A JP2318978A JP2318978A JPS54116583A JP S54116583 A JPS54116583 A JP S54116583A JP 2318978 A JP2318978 A JP 2318978A JP 2318978 A JP2318978 A JP 2318978A JP S54116583 A JPS54116583 A JP S54116583A
- Authority
- JP
- Japan
- Prior art keywords
- control
- backup
- automatic
- manual
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To enable a changeover of operations between automatic. manual and backup always in balanceless and automatically, and further enable a backup operation in the same handling manner as at the time of automatic. manual operation also for the operator.
CONSTITUTION: An arithmetic control 1 of the controller in the process control is effected a relational operation of the process signal from a transmission line 13 and the set value from a setter 11, with its control signal given to a control object 14 like control valves normally through lines a-c of a switching circuit 3. With a backup amplifier 2 provided in the device, the constitution is made such that normally through a line 5, the tracking is operated for a control signal of the arithmetic control 1, and a the time of backup operation, the arithmetic control 1 is to operate the tracking for an output signal of the amplifier 2 by a line 4. And an alarm device 12 is provided for signaling an alarm by comparing a process signal with the above described set value, simultaneously with a selector switch 9 provided for automatic A, manual M, backup B.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2318978A JPS54116583A (en) | 1978-02-28 | 1978-02-28 | Controller with back-up mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2318978A JPS54116583A (en) | 1978-02-28 | 1978-02-28 | Controller with back-up mechanism |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54116583A true JPS54116583A (en) | 1979-09-10 |
Family
ID=12103702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2318978A Pending JPS54116583A (en) | 1978-02-28 | 1978-02-28 | Controller with back-up mechanism |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54116583A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57131701U (en) * | 1981-02-10 | 1982-08-17 | ||
JPS60207903A (en) * | 1984-03-31 | 1985-10-19 | Toshiba Corp | Backup system of digital controller |
-
1978
- 1978-02-28 JP JP2318978A patent/JPS54116583A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57131701U (en) * | 1981-02-10 | 1982-08-17 | ||
JPS60207903A (en) * | 1984-03-31 | 1985-10-19 | Toshiba Corp | Backup system of digital controller |
JPH0545961B2 (en) * | 1984-03-31 | 1993-07-12 | Tokyo Shibaura Electric Co |
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